Final answer:
The United States boycotted the 1980 Summer Olympic Games to protest the Soviet invasion of Afghanistan.
Step-by-step explanation:
The United States boycotted the 1980 Summer Olympic Games to protest the Soviet invasion of Afghanistan. In 1979, the Soviet Union invaded Afghanistan to support the communist government. The United States saw this as a violation of international law and deemed it necessary to boycott the Olympic Games hosted by the Soviet Union in Moscow as a form of protest.
Learn more about The United States' boycott of the 1980 Summer Olympic Games